GRASSES GROWN FOR SEED WEED CONTROL

Transcription

1 GRASS SEED WEEDS GRASSES GROWN FOR SEED WEED CONTROL Preplant, Preemergence, or Postemergence Herbicides Herbicide Rate/Acre Comments/Restrictions AIM EC up to 2 fl oz POST. Include NIS, MSO, or COC and UAN or AMS 1,2. Notes 3, 4. ASSURE II 10 fl oz Quizalofop-tolerant perennial ryegrass only: Apply at boot stage in spring of second year to suppress quackgrass growth and prevent quackgrass seed contamination during ryegrass harvest. See label for additional timing recommendations. BANVEL/DICAMBA MAX pt POST. Apply pt/a to seedling grass after 3-5-lf and up to 2 pt/a to established grass. Do not apply after it begins to joint. PHI lactating dairy: up to 1 pt/a- 7 days grazing, 37 days hay; up to 2 pt/a- 21 days grazing, 51 days hay. PHI 0 days non-lactating animals. Note 3. BISON 1-2 pt POST. Supplemental label (exp. date not given): Apply before boot stage to new and established grasses. Notes 3, 5. BRASH up to 4 pt POST. Do not apply after jointing stage. PHI 7 days grazing for lactating dairy, 37 days for hay or silage. Note 3. CALLISTO/ 3-6 fl oz PRE or POST. PRE at 6 fl oz/a to newly seeded crop prior to crop or weed emergence. POST at 3-6 fl oz/a. Include INCINERATE NIS or HSOC-COC 1 plus UAN/AMS. Do not harvest seed for 60 days. PHI grazing or feeding is 14 days after harvest and 74 days after application. 24c OR (exp. 5/2018) Callisto for aerial application to bluegrass, tall fescue and annual/perennial ryegrass grown for seed. 2ee ID, OR, WA (exp. date not given) Callisto for control/suppression of specific weeds in bluegrass, perennial ryegrass and tall fescue grown for seed. CHARGER BASIC/ pt PRE. ID, OR, and WA only. Apply to established stands just before, during, or immediately following first fall rains or DUAL MAGNUM just before or during a late summer or early fall irrigation, but before target grasses emerge. Use 1 pt/a for fine fescue and perennial ryegrass and pt/a for orchardgrass, bentgrass, tall fescue, and Kentucky bluegrass. PHI 60 or 150 days for grazing, anytime between seed harvest and before next application for hay. CORNERSTONE PLUS/ See label + PP or PRE to emerged weeds prior to crop emergence. Rate depe nds on weed species. PHI grazing or feed 8 TOMAHAWK 4 or lb AMS/100 gal a weeks. a Include NIS or WC+NIS 2 as needed. CORNERSTONE 5 PLUS/ TOMAHAWK 5 CURTAIL 2-4 pt POST. Established grass only. Apply to established grass before boot stage. PHI 14 days grazing for dairy, 7 days for hay or forage. Note 3. CURTAIL M pt POST. Apply to established grass before boot stage. Potential for grass injury. PHI 7 days for grazing. DICAMBA MAX 4 SEE BANVEL DIMETRIC EXT/ lb POST. For WA, WY, MT and parts of OR. Apply to established grasses at least one year old and harvested for seed METRICLUDE EXT once. Volunteer grasses should be 1-2 leaf following rainfall or irrigation and before active spring growth. PHI 120 days for seed and 28 days for feed. Use rates depend on grass species and state. DIREX 4L or 1.6 qt or PRE. Apply in FALL to established tall fescue on soils with 1% O.M. Do not apply the same fall fescue was KARMEX XP 2 lb planted. For best results, rain is needed within 2 weeks of application. DUAL II MAGNUM pt PRE. Apply to established stands for preemergent control of weeds. Use 1 pt on fine fescues and perennial ryegrass. Apply once per crop year. ID, OR, and WA only. See label for forage and grazing restrictions. DURANGO DMA/ 4-12 fl oz POST. Supplemental label for Durango DMA and Duramax (exp. date not given): Apply to glyphosate tolerant tall DURAMAX and fine fescues for seed; to new seedings 6 weeks after germination; to established stands after growth resumes in the fall and in spring after dormancy break; PHI 60 days. ELEVORE 1 fl oz PP burndown to actively growing weeds up to 14 days before planting rye grasses. Use with MSO. ENGENIA fl oz Apply when weeds are <4 high and rosettes <2 across. Apply to seedling grasses after crop reaches 3- to 5-leaf stage. EVEREST fl oz + 24c OR, (exp. 12/20210) and MN (exp. date not given) for application during year of establishment to Kentucky 1 qt NIS/100 gal bluegrass grown for seed only. Do not use in annual bluegrass seed production systems. See label for all restrictions. Note 5. EXPRESS oz POST. In ID, OR, or WA, and UT, use 0.25 oz/a for annual ryegrass, orchardgrass, tall fescue and fine fescue after the 4-lf stage. For bentgrass, use 0.25 oz/a after 3-5 stolons. For bluegrass, use oz/a after the 4-lf stage. In MN, use 0.25 oz/a after 4-5-lf timothy (include 0.5 lb 2,4-D), and oz/a after 4-lf bluegrass. For perennial ryegrass, use 0.25 oz/a (0.15 oz/a in MN) after 5-6 lf stage. Use oz/a ( oz/a in MN) for established stands prior to jointing. Include 2,4-D, dicamba or liquid nitrogen. Supplemental label (exp. date not given) for ID, OR, WA, and UT. Notes 3,4. SEE NOTES AT END OF SECTION. 1 Between and Superb HC (COC) and Succeed/Ultra and Destiny HC (MSO) are HSOC adjuvants, generally used at half standard COC or MSO rates. 326

2 GRASSES GROWN FOR SEED WEED CONTROL Preplant, Preemergence, or Postemergence Herbicides (continued) Herbicide Rate/Acre Comments/Restrictions FACET L fl oz POST-HARVEST. Apply after grass seed harvest and hay removal; before first killing frost. Add 1 pt HSOC-COC 1 or pt HSOC-MSO 1 /A. WC+NIS 2 or a UAN can be added for better efficacy. In ID, MT, NV, OR, UT, WA, WY wheat may be planted 6 months after application. FUSILADE DX 8-16 fl oz POST. 24c for fine fescues grown for seed use only: ID - fall only (exp. 12/2019); OR (exp. 12/2021); WA (exp. 12/2020). See label for rates and weeds. Apply before seedhead develops in the boot. GOAL 2XL 8-24 fl oz + POST. ID, OR, WA only. For established Kentucky bluegrass, tall fescue, orchardgrass, bentgrass, and perennial qt NIS/100 gal ryegrass. Do not graze. 24c WA (exp. 12/2018) in established perennial grasses grown for seed. GRAMOXONE SL/SL pt + PP and PRE. Prepare the seedbed and allow weeds to germinate. Apply to 3-5 leaf weeds. Note 5. 1 pt NIS/100 gal HI-DEP 1-4 pt POST. Do not apply from early boot to milk stage. Seedlings after 5-lf stage with pt. PHI 7 days dairy grazing, 30 days for hay. Note 3. INCINERATE SEE CALLISTO MCPA AMINE 1-2 pt POST. Apply to established grass before the head comes into boot and to seedlings after tillering (after 5-lf for or PHENOXY Phenoxy). Note 3. MOXY 1-2 pt POST. Apply before boot stage to new and established grasses. Notes 3,5. OPTIFY 5-12 fl oz Plant Growth Regulator. At planting: 5 fl oz/a apply with liquid fertilizer. Broadcast, side or top dress: 8-12 fl oz/a. Via irrigation: 8 fl oz/a. Foliar: Apply 6 fl oz/a in minimum 5 GPA directly to foliage of actively growing plants. Best results when applied with nutrients. Repeat application 7 days. Do not apply >24 oz/a/season. OUTLOOK fl oz PRE. Established stands of perennial grasses one year old or harvested at least once for seed. Apply in the FALL post-harvest prior to the emergence of weeds in warm and cool-season grasses, during winter dormancy in warm season grasses, or in spring to cool-season grasses. Note 5. PALISADE 2EC Single application: POST. Plant growth regulator. Apply before or during stem elongation (Feekes 5-8/Zadoks 30-37). For split fl oz application, apply 7-10 days after first application. PHI 35 days. Do not graze or feed for 49 days after application. Split application: May be applied through irrigation systems fl oz PASTUREGARD HL Up to 2 qt POST. Do not apply until seedlings are well established (tillering- usually 4 true leaves, and development of secondary root system). Do not use from early boot to milk stage. Do not graze lactating dairy. PHI 14 days hay. Note 3. PROWL H2O pt PRE. For established Kentucky bluegrass, tall fescue, orchardgrass, perennial ryegrass, bentrgrass, fine fescue, or basin wild rye. Apply to grass crop with 6 or more tillers per plant at the beginning of significant fall rain and prior to weed germination. PHI 1 year grazing or hay. RELY 280 Up to 10 fl oz: fall POST. 24c OR (exp. 12/2020): Weed control in grass grown for seed production (grass tolerance varies, see label); fl oz: spring apply in fall, after 1st tiller, not exceeding 10 fl oz/a; for established grass, with a minimum of 4 tillers, use up to 16.5 fl oz/a; do not apply after Dec 1; in spring, use fl oz/a on 4-6 tiller grass before April 1. Shielded sprayers may be used. ROUNDUP POWERMAX/ see label + PP or PRE to emerged weeds prior to crop emergence. Rate depends on weed species. PHI grazing or feed 8 WEATHERMAX lb AMS/100 gal a weeks. a Include WC+NIS 2 or Alliance as needed. SHARPEN 1-2 fl oz + POST for emerged broadleaf weeds. Apply until 1 week before the boot stage pt HSOC-MSO 1 SHREDDER E-99 SEE 2,4-D SINBAR WDG lb POST. Grass must be established for at least one growing season % OM apply 0.5 lb/a Sinbar in tall fescue % OM apply a.i. lb/a Sinbar to Kentucky bluegrass. Use lower end of rate range on coarse soils. STARANE NXT fl oz POST. Apply to seedling grasses from the 2-leaf crop growth stage up to early boot stage for control of labeled broadleaf weeds. Seedling grasses tolerant include Kentucky bluegrass, fescue, orchardgrass and perennial rye grass. Starane NXT may also be applied to established grasses prior to the early boot stage. Established grasses tolerant include bluegrass, fescue, ryegrass and bermudagrass. Note 5. STARANE ULTRA pt POST. Apply to established grasses in the spring when weeds are actively growing and before weeds are 8 tall. New plantings of grass crops may be treated from the 2 true leaf stage of growth prior to early boot stage. Do not apply during boot, flowering, or seed development stage of growth if grass crop is to be harvested for seed. PHI 7 days hay or silage. Note 5. SEE NOTES AT END OF SECTION. 1 Between and Superb HC (COC) and Succeed/Ultra and Destiny HC (MSO) are HSOC adjuvants, generally used at half standard COC or MSO rates. GRASS SEED WEEDS 327

3 GRASSES GROWN FOR SEED WEED CONTROL GRASS SEED WEEDS Preplant, Preemergence, or Postemergence Herbicides (continued) Herbicide Rate/Acre Comments/Restrictions STERLING BLUE/ pt POST. Apply pt to seedling grass after 3-5-lf and up to 2 pt to established grass. Do not apply after it begins CLARIFIER/CLARITY to joint. Same PHIs as Banve/Dicamba Max 4l. Note 3. STINGER pt POST. Established grass only. Apply to established grasses before the boot stage. Notes 3,4. SURMOUNT Up to 3 qt POST. Do not apply untill seedlings are well established (tillering- usually 4 true leaves, and development of secondary root system). Do not use from early boot to milk stage. Dairy: do not graze lactating dairy, PHI 14 days forage. PHI 7 days hay. Note 3. TARGA 10 fl oz Quizalofop-tolerant perennial ryegrass only: Apply at boot stage in spring of second year to suppress quackgrass growth and prevent quackgrass seed contamination during ryegrass harvest. See label for additional timing recommendations. TREFLAN TR lb POST. 24c AZ, CA (exp. 12/2021) for weed control in established bermudagrass. WIDEMATCH pt POST. Supplemental label (exp. date not given): Apply to new grass from 2 true leaf to just before early boot stage and to established grass in the spring from tiller to prior to early boot stage. PHI 7 days for hay or silage, 0 days for grazing. Note 3. 2,4-D 1-4 pt POST. Use pt Amine 4 or LV 4, pt LV 6 or pt E-99 on seedling grass. LV 4, LV 6, Amine 4: apply AMINE 4orLV 4or 1-3 pt to established grass before the head comes into boot. LV 4, LV 6: apply to seedlings in the spring after tillering (at LV 6or pt least 5-lf stage) but before boot stage. Amine 4: apply to seedlings in the spring after at least 5-lf stage but be- SHREDDER E pt fore boot stage. E-99: apply to seedling grass at 5-lf or later, do not apply in the early boot to milk stage. Note 2. 1 Between and Superb HC (COC) and Succeed/Ultra and Destiny HC (MSO) are HSOC adjuvants, generally used at half standard COC or MSO rates. Note 2: Not labeled in CA. Note 3: No PHI restrictions. Note 4: No grazing or forage restrictions. Note 5: Grazing or foraging is not allowed. Also, see Pasture section. 328

4 Labeled Insecticides GRASSES GROWN FOR SEED INSECT CONTROL GRASS FOR SEED INSECT INSECTICIDE Aphid l l l l l l l Armyworm l l l l l l l l l l l l Army Cutworm l l l l l l Billbugs S l l S 3 l S l 2 Cranefly l l l l l l 1 Cutworms l l l l l l l l l Garden Symphylan Grasshopper l l l l l l l l l Meadow Plant Bug l l l Sod Webworm l l l l l l l l Thrips l l l l l l l l Winter Grain Mite l l l S - Suppression. 1 European crane fly larvae only. 2 Adults only. 3 Larvae only. Baythroid XL Besiege Blackhawk Brigade 2EC Declare Dimate 4E/Dimethoate 4E Entrust SC Grizzly Too Lorsban Advanced Mustang Maxx Renounce Sevin XLR Plus Warrior II Yuma GRASS SEED INSECTS Insect Treatment Guidelines APHID Seedling plants are most susceptible to damage. All aphid species can vector barley yellow dwarf virus (BYDV). ET: Treat when heads begin to form during boot stage and aphid populations are per stem. ET Birdcherry oat aphid: Treat when there are more than 10 aphids per 2- to 6-leaf seedling and population is increasing. Best control is obtained before insects roll leaves. BESIEGE 6-9 fl oz 7 Bird Cherry-oat, English grain, Greenbug, Sugarcane aphids. PHI 7 days for straw, hay, and seed for feed. Regrowth may be used for grazing, forage, or hay. DIMATE 4E/DIMETHOATE 4E pt 14 ID, OR, WA only. Do not apply to seed bermudagrass. GRIZZLY TOO fl oz 7 Bird cherry-oat, English grain, Russian wheat, sugarcane aphids. PHI 7 days for straw, hay, and mature seed for feed. Regrowth may be used for grazing, forage, or hay. Maximum LORSBAN ADVANCED 1-2 pt NO 24c NV (exp. date not given) for insect control in perennial grass seed crops, and ID (exp. date not given) for perennial grass seed crops during year of establishment. 24c OR (exp. 12/2018) for insect control in perennial grass grown for seed. Treat before heading as colonies form. Maximum 3 applications/year. MUSTANG MAXX fl oz 7 0, 17 PHI 0 days forage and hay, not less than 17 days straw and seed screenings. Not labeled for Russian wheat aphid. ARMYWORM Most armyworm damage occurs in late summer to early fall and are cyclical. Outbreaks can occur very rapidly and create extensive damage. Scout in late July to early August every 5 to 7 days. Treat when 5 to 10 armyworm larvae per square foot are observed and populations are increasing. Control is most effective on small larvae (<1/4 ). BAYTHROID XL fl oz 0 0 Apply fl oz/a for true armyworm and fl oz/a for 1st and 2nd instar of beet, fall, southern, western yellowstriped, and yellowstriped armyworms. Maximum 11.3 fl oz/a/crop season. BESIEGE 6-9 fl oz 7 Beet, fall, southern, true, yellowstriped. PHI 7 days for straw, hay, and seed for feed. Regrowth may be used for grazing, forage, or hay. BRIGADE 2EC 6.4 fl oz 30 Fall, southern, true, yellowstriped. ID, OR, WA only. Supplemental label. PHI 30 days for forage and hay. BLACKHAWK oz 3 Beet, fall, southern, true. PHI 3 days hay or fodder. Maximum 6 applications/season. 329

5 GRASSES GROWN FOR SEED INSECT CONTROL GRASS SEED INSECTS Insect Treatment Guidelines (continued) ARMYWORM (continued) ENTRUST SC 2-4 fl oz 3 Beet, fall, southern, true. PHI 3 days hay or fodder. Maximum 6 applications/season. GRIZZLY TOO fl oz 7 Beet, fall, southern, true, yellowstriped. PHI 7 days for straw, hay, and mature seed for feed. Regrowth may be used for grazing, forage, or hay. Maximum MUSTANG MAXX fl oz 7 0, 17 PHI 0 days forage and hay, not less than 17 days straw and seed screenings. RENOUNCE oz 0 0 1st and 2nd instar. Maximum 14.1 oz/a/crop season. SEVIN XLR PLUS qt Maximum 3 qt/a/year. WARRIOR II fl oz 7 Beet, fall, southern, true, yellowstriped. PHI 7 days for straw, hay, and mature seed for feed. Regrowth may be used for grazing, forage, or hay. Maximum YUMA 1 qt Supplemental label. ARMY CUTWORM Scout for larvae in fall or winter if defoliation is observed. BAYTHROID XL fl oz 0 0 Maximum 11.3 fl oz/a/crop season. BESIEGE 5-8 fl oz 7 PHI 7 days for straw, hay, and seed for feed. Regrowth may be used for grazing, forage, or hay. BLACKHAWK oz 3 PHI 3 days hay or fodder. Maximum 6 applications/season. GRIZZLY TOO fl oz 7 PHI 7 days for straw, hay, and mature seed for feed. Regrowth may be used for grazing, forage, or hay. Maximum WARRIOR II fl oz 7 PHI 7 days for straw, hay, and mature seed for feed. Regrowth may be used for grazing, forage, or hay. Maximum BILLBUGS Scout for billbugs from late March to early April and again from mid-october to early November by inspecting crowns or using pitfall traps. No economic threshold has been established, but it is recommended to treat when adult feeding damage is present in 5-10% of crowns. BESIEGE 6-9 fl oz 7 Suppression only. BRIGADE 2EC 6.4 fl oz 30 Hunting bill bug. ID, OR, WA only. Supplemental label. PHI 30 days for forage and hay. GRIZZLY TOO fl oz 7 Suppression only. PHI 7 days for straw, hay, and mature seed for feed. Regrowth may be used for grazing, forage, or hay. Maximum LORSBAN ADVANCED 1 qt NO 24c NV (exp. date not given) for perennial grass seed crops, and ID (exp. date not given) for perennial grass seed crops during year of establishment. 24c OR (exp. 12/2018) for insect control in perennial grass grown for seed. Apply when adults are active. Maximum 3 applications/season. WARRIOR II fl oz 7 Suppression only. PHI 7 days for straw, hay, and mature seed for feed. Regrowth may be used for grazing, forage, or hay. Maximum YUMA 1-2 qt Supplemental label. CRANEFLY Crane fly larvae damage grass roots and crowns after emerging in the fall and again in spring. Damage can result in stand loss. Incidence of crane fly larvae increase with heavy rainfall and wet conditions. Research has suggested that control is best when larvae are targeted with insecticide treatments when 5-10 larvae are present per square foot. SEVIN XLR PLUS qt Range crane fly. Maximum 3 qt/a/year. YUMA 1 qt European crane fly larvae. Supplemental label. CUTWORMS BAYTHROID XL fl oz 0 0 Maximum 11.3 fl oz/a/crop season. Damage occurs from spring through fall and may occur in the same parts of the field each year. Larvae mainly feed on leaves and crowns and damage appears as circular patches of dead grass. Treat when cutworms first appear. 330

6 GRASSES GROWN FOR SEED INSECT CONTROL Insect Treatment Guidelines (continued) CUTWORMS (continued) BESIEGE 5-8 fl oz - 7 PHI 7 days for straw, hay, and mature seed for feed. Regrowth may be used for grazing, forage, or hay. BRIGADE 2EC 6.4 fl oz - 30 ID, OR, WA only. Supplemental label. PHI 30 days for forage and hay. GRIZZLY TOO fl oz - 7 PHI 7 days for straw, hay, and mature seed for feed. Regrowth may be used for grazing, forage, or hay. Maximum LORSBAN ADVANCED 1 qt - NO 24c NV (exp. date not given) for perennial grass seed crops, and ID (exp. date not given) for perennial grass seed crops during year of establishment. 24c OR (exp. 12/2018) for insect control in perennial grass grown for seed. Apply in spring or fall when larvae first appear. Maximum 3 applications/season. MUSTANG MAXX oz 7 0, 17 PHI 0 days forage and hay, not less than 17 days straw and seed screenings. WARRIOR II fl oz - 7 PHI 7 days for straw, hay, and mature seed for feed. Regrowth may be used for grazing, forage, or hay. Maximum YUMA 1 qt - - Supplemental label. GRASSHOPPER Young and adults feed on leaves, stems, and seed heads, preventing seed from reaching maturity. Grasshoppers are easier to control when they are small. BAYTHROID XL fl oz 0 0 Maximum 11.3 fl oz/a/crop season. MUSTANG MAXX fl oz 7 0, 17 PHI 0 days forage and hay, not less than 17 days straw and seed screenings. RENOUNCE fl oz 0 0 Maximum 14.1 oz/a/crop season. YUMA 1 qt Supplemental label. MEADOW PLANT BUG Produces silver top effect and a rank odor. GRASS SEED INSECTS DIMATE 4E/DIMETHOATE 4E pt 14 ID, OR, WA only. Do not apply to seed bermudagrass. MUSTANG MAXX fl oz 7 0, 17 PHI 0 days forage and hay, not less than 17 days straw and seed screenings. SOD WEBWORM Larvae feed from late June through October on crowns and roots, damaging established stands. Scout for larvae in the early fall when 2-6 per crown are observed. BAYTHROID XL fl oz 0 0 Maximum 11.3 fl oz/a/crop season. BLACKHAWK oz 3 PHI 3 days hay or fodder. Maximum 6 applications/season. MUSTANG MAXX fl oz 7 0, 17 PHI 0 days forage and hay, not less than 17 days straw and seed screenings. YUMA 1 qt Supplemental label. THRIPS BAYTHROID XL fl oz 0 0 Maximum 11.3 fl oz/a/crop season. Thrips damage causes grass foliage to turn white or rusty colored and causes silver top effect. Susceptibility varies by variety. Scout seed heads when plants approach boot stage. Treatment is justified when 25 or more thrips are present per head. 331

7 GRASS SEED INSECTS Insect Treatment Guidelines GRASSES GROWN FOR SEED INSECT CONTROL THRIPS (continued) DIMATE 4E/DIMETHOATE 4E pt 14 ID, OR, WA only. Do not apply to seed bermudagrass. RENOUNCE fl oz 0 0 Maximum 14.1 oz/a/crop season. SEVIN XLR PLUS qt Use high spray pressure to improve penetration into boot. Maximum 3 qt/a/year. WINTER GRAIN MITE Fields take on a gray to silver cast from October to May when infested. Extreme infestations can lead to plant death. Scout fields in October and November and again in late winter at dawn or dusk on cool and overcast days. Treat when visible leaf symptoms and several mites per plant are present. BESIEGE 6-9 fl oz 7 Suppression only. PHI 7 days for straw, hay, and mature seed for feed. Regrowth may be used for grazing, forage, or hay. DIMATE 4E/DIMETHOATE 4E pt 14 - ID, OR, WA only. Do not apply to seed bermudagrass. YUMA 1 qt - - Supplemental label. 332